For me AutoKey is absolutely essential to my workflow. I have tons of text expansions and shortcuts to “remap” keys. E.g., respectively, typing dAt expands into 2025-05-08, 13:47:40 CEST, and pressing alt + k simulates the arrow down key.
Secondly there’s XScreenSaver which has so many wonderful (mathematical) visualizations that it would be a damn shame if these eventually get lost as Wayland gets more adoption.
None of these have Wayland alternatives as far as I know. For text expansion there’s Espanso, but it doesn’t support keyboard shortcuts yet.
To me it’s mostly the lack of feature parity in kwin between x11 and Wayland, specially lack of global menu support for GTK apps in Wayland.